Outline

Questionnaire: Traumatic hip dislocation is a rare injury in orthopaedic practice and typically occures in high energy trauma. The goal of this study was to analyze hip morphology in patients with low energy traumatic hip dislocations and to compare it with a control group.

Methods: We performed a retrospective comparative study. The study group included 45 patients with 45 traumatic posterior hip dislocation. The mean age at trauma was 34Â±15 years (range, 11–68 years) and included 42% of male patients. A low energy trauma was defined as a traumatic hip dislocation without a fracture or with a simple acetabular rim- or head fracture (Pipkin I and II). Traumatic dislocations combined with other acetabular or femoral fractures were excluded. This resulted in 20 dislocations (44%) without a fracture, 14 (31%) with a acetabular rim fracture, 8 (18%) with Pipkin I or II fracture, and 5 (11%) with a combined acetabular rim and femoral head fracture. The control group consisted of 90 patients (180 hips) that underwent radiographic examination for urogenital indication and had no history of hip pain. Hip morphology was assessed on antero-posterior and axial pelvic radiographs including parameters describing acetabular coverage computed by commercially available software called Hip2Norm.